Hello,
Please disable the Promo banner in the Theme Settings > General > Promo banner.
Create HTML block, insert the Popup element and configure and insert in to the header builder: https://xtemos.com/docs/woodmart/header-builder/add-edit-builder-elements/ and https://xtemos.com/docs/woodmart/html-blocks-2/#header_builder
You can move the content of your Promo banner into the Popup content: https://xtemos.com/docs/woodmart/html-blocks-2/#posts_products_page
If you have any questions please feel free to contact us.
Best Regards